the free shipping setting are disabled, how to use it

the free shipping setting are disabled, how to use it
Hi,i have ADDING NEW ATTRIBUTES -- shipping-- free shipping for some products (as the picture),but it not free shipping after i setting it.

please help me how to setting,then it will free shipping.

Thanks

That Attribute is nothing more than text ...

Just like if I set the text to read:
Get a Free Gift

That text doesn't "do anything" ...

If you want a Product to be Free Shipping for everyone ... then edit the Product and mark it as:

Always Free Shipping: Yes, Always Free Shipping

Or, set the Product Weight to 0 and in the Shipping/Packaging set the setting that 0 Weight means free shipping:

Order Free Shipping 0 Weight Status
If there is no weight to the order, does the order have Free Shipping?
0= no
1= yes

Note: When using Free Shipping, Enable the Free Shipping Module this will only show when shipping is free.

Be sure that the Free Shipping freeshipper shipping module is installed to work with these ...